{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40193", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.178Z", "datePublished": "2025-11-12T21:56:31.751Z", "dateUpdated": "2026-05-11T21:44:33.601Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:44:33.601Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxtensa: simdisk: add input size check in proc_write_simdisk\n\nA malicious user could pass an arbitrarily bad value\nto memdup_user_nul(), potentially causing kernel crash.\n\nThis follows the same pattern as commit ee76746387f6\n(\"netdevsim: prevent bad user input in nsim_dev_health_break_write()\")"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/xtensa/platforms/iss/simdisk.c"], "versions": [{"version": "b6c7e873daf765e41233b9752083b66442703b7a", "lessThan": "f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf", "status": "affected", "versionType": "git"}, {"version": "b6c7e873daf765e41233b9752083b66442703b7a", "lessThan": "151bd88859474cdaccc1e4c8b21fbf72dbba2ab4", "status": "affected", "versionType": "git"}, {"version": "b6c7e873daf765e41233b9752083b66442703b7a", "lessThan": "d381de7fd4cdc928ede96987dc64b133e6480dd6", "status": "affected", "versionType": "git"}, {"version": "b6c7e873daf765e41233b9752083b66442703b7a", "lessThan": "a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a", "status": "affected", "versionType": "git"}, {"version": "b6c7e873daf765e41233b9752083b66442703b7a", "lessThan": "5d5f08fd0cd970184376bee07d59f635c8403f63", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/xtensa/platforms/iss/simdisk.c"], "versions": [{"version": "3.9", "status": "affected"}, {"version": "0", "lessThan": "3.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.157", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.113", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.54", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.4", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.1.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.6.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.12.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.17.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf"}, {"url": "https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4"}, {"url": "https://git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6"}, {"url": "https://git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a"}, {"url": "https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63"}], "title": "xtensa: simdisk: add input size check in proc_write_simdisk", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxtensa: simdisk: add input size check in proc_write_simdisk\n\nA malicious user could pass an arbitrarily bad value\nto memdup_user_nul(), potentially causing kernel crash.\n\nThis follows the same pattern as commit ee76746387f6\n(\"netdevsim: prevent bad user input in nsim_dev_health_break_write()\")"}], "id": "CVE-2025-40193", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-11-12T22:15:46.307", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/151bd88859474cdaccc1e4c8b21fbf72dbba2ab4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d5f08fd0cd970184376bee07d59f635c8403f63"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a0c2c36d864ef3676b05cfd8c58b72ee3214cb1a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d381de7fd4cdc928ede96987dc64b133e6480dd6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f40405ccfb87b71175f2d5d004c0b8a0aebcc2cf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: xtensa: simdisk: add input size check in proc_write_simdisk", "id": "2414743", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414743"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-40193", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-11-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40193\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40193\nhttps://lore.kernel.org/linux-cve-announce/2025111245-CVE-2025-40193-6519@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-11-13T09:52:12.792218+00:00", "updated": "2025-11-13T09:52:12.792244+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}